Gert, The only time I've seen something (legitimately) similar is when the interface is configured for port monitoring (older 3500xls) or Span.
Eric Gauthier On Wed, Feb 02, 2011 at 08:35:21AM +0100, Gert Doering wrote: > Hi, > > got hit by a quite interesting bug in the CBS3020 switches yesterday: > > sw2-int.blau#sh int g0/24 > GigabitEthernet0/24 is up, line protocol is down (disabled) > ... > 5 minute input rate 1759000 bits/sec, 350 packets/sec > 5 minute output rate 2122000 bits/sec, 383 packets/sec > > this interface is "up/down" since about a day, and happily forwarding > packets. It does *not* do CDP, which is how we noticed (we monitor > CDP relationships to see topology/device changes). > > This is a WS-CBS3020-HPQ, running cbs30x0-ipbase-mz.122-53.SE1, and > the interface config is really trivial: > > interface GigabitEthernet0/24 > description Trunk to sw1-int.blau:gi0/24 > switchport trunk allowed vlan 79-82,87-89 > switchport mode trunk > media-type internal > end > > ... and no matter what I do (shut/no shut on either end, change > media-type to external/internal) will bring the port back to up/up. > > Shutting down the other end will bring the port to down/down, so it's > still noticing something :-) - but unshutting will bring it back to up/down. > > "errdisable autorecovery" didn't help either. > > Weird, eh? > > > Question to the list: has one of you seen this, and found a way to un-stick > the port without rebooting? > > gert > -- > USENET is *not* the non-clickable part of WWW! > //www.muc.de/~gert/ > Gert Doering - Munich, Germany [email protected] > fax: +49-89-35655025 [email protected] > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
